Valve-spring compressor



J am 9, 1923. 1,441,723.,

E. H. DEWEY.

VALVE SPRING COMPRESSOR. FILED DEC.13, I921.

INVEN TOR.

7LWZ 6} gm A TTORNEY.

EDWARD H. DEWEY, OF CHIGOPEE FALLS,*1VIASSAGHUSETTS, ASSIGNCE FOURTH r0FRANK A. CHAMPLIN,

AND ONE-FO URTH TO DANIEL 1*..MORIARTY,

VALVE-SPRING COMPRESSOR:

Application filed December To all whom it may concern:

Be it known that I, EDWARD H. DEWEY, a citizen of the United StatesofAmerica, and a resident of Chlcopee Falls, in the county of .Hampdenand State of Massachusetts, have invented a new and useful ringCompressor, of which the following 1s a specification.

My invention relates to improvements in tools or implementsfor use indetaching poppet-valves of internal-combustion engines, and consists ofa double-headed ratchet baror lever, the heads of such lever beingbifurcated and provided with upturned ends, a hook pivotally connectedwith said lever, and a pawl pivotally connected with said hook, thepivotal connections in each case being adjustable, and the parts andmembers being of peculiar construction, all as hereinafter set forth-The primary object of myinvention is to producea comparatively simpleand inexpensive, yet strong, venient compressor for the valve-sprlngs ofinternal-combustion engines, which is capable of being applied to, atany suitable angle relative to the sides of, the engine, by hooking amember of such compressor over the manifold of such engine, withoutswinging or slippingout of engagement with the cup at the base of thevalve spring.

Another object is to provide a device of this character which canreadily be adjusted to meet that it will compress the spring evenly oruniformly.

Other objects and advantages will appear inthe course of the followingdescription.

I attain the objects and secure the advantages of my invention by themeans illustrated' in the: accompanying drawings, in

which-- V i i Figure 1 is a top plan of a valve-spring compressor whichembodies a preferred.

' form of my invention; Fig. 2, a side elevation of said compressor,and, Fig. 3, a top plan of a modified form of construction.

Similar reference characters designate siinilar parts throughout theseveral views. Referring first to the preferred form of the invention asillustrated in the first two views, it will be seen that the comprises abar or lever 1 having bifurcated heads. or forked terminals 2 and 3,theouter durable, and con different conditions, and so '13, 1921. .SerialNO. 521,974.

ends of which terminals are turned upwardly to form lugs 4t, andsaidlever also having'on the upper edge thereof two sets of ratchetteeth 5; a hook 6 pivotally connected at the base with said lever; and apawl 7 pivotally connected at the upper terminal with said hookintermediate of the ends thereof.

Preferably the lever 1, instead of being straight, extends upwardly inboth directrons from the transverse center thereof,'or

has two sections that form an obtuse angle with each other,substantially as shown. This is for the purpose of enabling theimplement to be used on a car where the fenders are at an acute angle tothe frame, and where it would be difficult or impossible to employ theimplement if the lever were straight. The head 2 is wider than theheadfiof the lever 1, and the opening or slot, as 8, in said firstnamed headis correspondingly wider than the slot, as 9, in said secondnalned head,so that the former is adapted for large valve-stems and tappets, and thelatter for small valve-stems and tappets.

The teeth5 on each side ofthe transverse center of t 'ielever 1 aredirected toward the vertical plane of such center, and all are adaptedto be engaged by the free terminal of the ratchet 7, inthemannerhereinafter explained.

There is a plurality of transversesopenings 10 through the lever 1 eachside of the aforesaid transverse center, and a screw 11, which serves asthe pivot between thehook 6 and said lever, is adapted to bereceived inany of said openings. At the bottom of the hook 7 is a. clevls or fork12 that is adapted to fit over the lever 1 and the teeth 5, and to beconnected with said lever bythe screw 11. There is a plurality ofopenings 20 in the-arms of the fork 12. A nut 13 is provided to retaintheyscrew after being passed through one pair of openings 20 in the armsof the fork 12 and one or" the openings 10 in the lever 1. Thus it seenthat the pivotal connection between the hook andlever can be changed oradjusted to meet different conditions. There is a plurality oftransverse openings 1% through the hook 6 intermediate of the endsthereof, and a screw :15, which serves as the pivot between the pawl 7and or inclined 11 in place to be connected with s I "lids-The screw 15passesthrough the fork 16, thearms of which'are perforated to receivesaid screw, and one of the openings 14,. A nut 17 is provided to holdthe screw 15 in place. v By changing the location of the screw 15, ortransferring it from one open- Ting 14 to another, the pivotalconnection between the pawl 7 and the hook 6 is changed. Thus provisionis made for changing or ad-- justlng the position of the p votalconnection between nieetdi'lferent conditions involved in'the use orapplication of 3 is introduced beneath the e to be compressed, and-thebar l isgrasped attheternnnal opposite to said head and the compressor.a v 'When the hook 6 lSCOllIlQCtQCl with the lever 1 1n the manner upperterminal of the hook 6 is placed over the manifold,the head cupof thespring '7 forced downwardly, with the screwdl. as

, 15and thefree over the left-h 4: engages one or a fulcrum for saidbar, until' the spring is suff ciently compressed.

As this operation takes place the pawl 7 swings onthe screw terminal ofsaidpawl moves transverse center of the lever-1, and finally automatic."The valve-stein at this time is inthe slot 9, and the lugs eat the outerend of the "head ,3 engage 'cup, either during the comfthe removalof thevalve. VVhen it IS desired to remove the compressor,it 1s 7 the freeterminal of the lever 1 sufficiently to enable the pawl '7 to bereleased from the toothl5 with which itis engaged, swing saidpawliipwarclly on the screw 15, permit said lever toswing on the screwti on a-nd to' the extent required to release the springfand remove thehook ,6 from the manifold.

The manifold, valve spring cup, and

' other engine parts and members herein men'- tioned are too well knowntoneed to be illus-w 'of my 1 inthe manner'herein .the former: does notplaced n positlon over it is possible to manipulate this implement .thatthe pawl 7 to engage the teeth 5 at ,;the' right of the the pawl 7" andthe hook 6 to 1 stantially the same as that already described.

illustrated, the application or operation of the compressor is asfollowsThe curved hook 6 and the lever 11in different made, but that the partsare interchangeable 7 so that either end of said lever-canbe employed.

nd set of teeth 5 toward the l a perforated terminal that is receivablein said teeth, thus locking the parts and retaining the spring under comPTBSSi OILLthG movement of the pawl being struction, and arrangement ofsome or all th t d f th of the parts of this device may be made with-,cup, whichlatter is seatedIon said head, and v so preventthelatter fromslipping out from "beneath said pressing. operationor while the springis", v I held under compression for s e to secure by 45 simply necessaryto depress said hook and adapted to engage the serra- 11 in the direc-,

opposite sides of the transverse center of with the lever with'one hand,especially in view of the fact antomatically engages the teeth 5 as thefree end of the lever 1 is depressed. 1 v I If it be d'esiredto use theheadQ instead 7 of the head 8, the nut 13 is removed from the screw 11,the latter-is withdrawn, the hook 6 is turned about and its fork 12placed over the lever 11 adjacent to one of the openings "10 atthe leftof the transverse 7 center of said lever, said screw is reinserted insaid fork and passed through the required opening, and said nut isreturned to: place on the screw. The pawl 7 is now in position aforesaidcenter. The operation of the compressor under the new arrangement 1Ssub- Tt is clear fromthe, foregoing, notonly that any requiredadjustment between the 1 by locating the screw 7 openings :10 inaset-and be tween thepawl 7 andsaid leverby locating the screw 15 indifferent openings 14% can be In the modification illustrated in Fig. 3,a bar 18 is shown which ,iswider thanthe bar 1 and has alongitudinalslot 19 therein between the heads .2 and 3, and the hook 6. is madewithoutthe fork 12, but instead has I said slot. Otherwise. thisconstruction is similar to the first, and the operation of the same isnot materially different. a ''More or lesschange in the shape, size,conoutdeparting from the spiritof my invention or exceeding the scope ofwhat is claimed. i I

What I :claim as my, inve11tion,-and de- Letters Patent, is-

1. A valve springcompressor comprising a forked and serrated'lever,amanifold-en. gaging hook pivotally connected with said lever, and apawl pivotally connected with tions in said lever.

2. The combination, in a valve-spring compressonwith a lever havingforked terminals with upturned lugs at their ends, and provided with twosets of ratchet teeth on said lever, of a. 'manifold-engaging hook,means to connect'said hook pivotally with said lever either side of saidcenter, and a pawl pivotally connected with said hook and adapted toengage the teeth in the set that is on the opposite side of said vcenterto that where said hook is pivotally connected with said lever. i

3. The combination, in a valve-spring compressor, with a leverhavingforked terminals with upturned lugs at their ends, and providedwith two sets of ratchet teeth on opposite sides of the transversecenter of said lever, of a manifold-engaging hook, means to connect saidhook pivotally with said lever either side of said center, a pawladapted to engage the teeth inthe set that is on the opposite side ofsaid center to that where said hook is pivotally connected with saidlever, and adjustable means pivotally to connect said pawl with saidhook.

4. The combination, in a valve-spring compressor, with a leverconsisting of two sections that form an obtuse angle with each other,said lever having :torked terminals with upturned lugs at their ends,and provided with two sets of ratchet teeth on opposite sides of thetransverse center of said lever, of a manifold-engaging hook, means toconnectsaid hook pivotally with said lever either side of said center,and a pawl pivotally connected with said hook and adapted to engage theteeth in the set that is on the opposite side of said center to thatwhere said hook is pivotally connected with said lever.

5. The combination, in a valve-spring compressor, with a lever providedwith forked terminals having upturned ends, and also, on opposite sidesof the transverse center of said lever, with ratchet teeth on the upperedge and openings which extend through the sides thereof, of amanifoldengaging hook, pivotal means for connecting the base of saidhook with said lever through any of said openings, and a pawl pivotallyconnected with said hook intermediate of its ends, and adapted to engageany of said teeth.

valve-spring compressor comprising a forked and serrated lever having alongitudinally-extending slot intermediate of the ends thereof, amanifold-engaging hook having the lower terminal inserted in said slotand pivotally connected with said lever, and a pawl pivotally connectedwith said hook and adapted to engage the serrations in said lever.

7. The combination, in. a valve-spring compressor, with a lever havingforked terminals with upturned lugs at their ends, and alongitudinallvextending slot intermediate of such ends, and providedwith two sets of ratchet teeth located on opposite sides of thetransverse center of said lever, said teeth being formed on the upperlongitudinal edges of the portions of the lever separated by said slot,of a manifold-engaging hook having its lower terminal in said slot,means to connect said hook pivotally with said lever either side of saidcenter, and a pawl pivctally connected with said hook and adapted toengage .the teeth in the set that is on the opposite side of said centerto that where said hook is pivotally connected with said lever.

ED /VARD H. DElVEY. Witnesses F. A. CUTTER, F. A. CI-IAMILIN.

